Air Intake Filter Performance Test System

The Air Intake Filter Test System is designed to evaluate the filtration performance, airflow characteristics, and dust holding capacity of air intake filters used in engines and industrial systems. The system fully complies with international standards such as ISO 5011, SAE J726, and GB/T 12485, providing accurate and repeatable results for both research and production quality control.

Applications

This test system is widely used for:

Performance evaluation of automotive air filters, industrial air filters, and engine intake systems.

R&D testing for new filter products and materials.

Quality inspection and certification by third-party laboratories.

Comparison and validation between domestic and international filter brands.

Conforming Standards

The system meets multiple global standards:

ISO 5011: Inlet air cleaning equipment for internal combustion engines and compressors.

SAE J726: Air cleaner test code for automotive and diesel engine filters.

GB/T 12485: Test methods for air cleaners used in internal combustion engines.

ISO 12103-1: Test dusts (A2 Fine and A4 Coarse) used for efficiency and dust holding capacity evaluation.

Key Test Procedures and Parameters

1. Restriction and Differential Pressure Test

Purpose: Measures resistance variation at different airflow rates to generate the pressure drop-airflow curve.

Method: Five flow rate points (50%–150% of rated flow) are selected; corresponding pressure drops (ΔP) are recorded.

Application: Evaluates airflow capacity and ensures the filter does not excessively restrict engine intake.

2. Initial Efficiency Test

Purpose: Determines the filter’s ability to capture dust particles at the start of operation.

Method:

Uses A2 Coarse or A4 Fine dust.

Introduces either 20 g of dust or a mass equivalent to six times the rated airflow (m³/min).

Calculates efficiency based on dust captured by the test filter and absolute filter.

Application: Assesses initial filtration performance of new filters.

3. Full-Life Efficiency Test

Purpose: Measures filtration efficiency over the filter’s entire service life.

Method:

Dust is fed continuously until the filter reaches its final restriction (e.g., 2.5 kPa).

Cumulative filtration efficiency is calculated throughout the process.

Application: Simulates real-world filter lifespan and clogging behavior.

4. Incremental Efficiency Test

Purpose: Evaluates filter performance at multiple loading stages.

Method: Efficiency is measured at 10%, 25%, and 50% of the pressure drop difference between the initial and final restriction.

Application: Helps analyze how filtration efficiency evolves over time.

5. Dust Holding Capacity Test

Purpose: Determines total dust mass retained in the filter before reaching the final restriction.

Method: The filter is weighed before and after testing to calculate total dust capacity.

Application: Evaluates filter longevity and maintenance intervals.

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